SO2 Detection over a Wide Range of Concentrations: An Exploration on MOX-Based Gas Sensors

Rossi, Arianna; Spagnoli, Elena; Visonà, Alan; Ahmed, Danial; Marzocchi, Marco; Guidi, Vincenzo; Fabbri, Barbara

doi:10.3390/chemosensors12060111

Open AccessArticle

SO₂ Detection over a Wide Range of Concentrations: An Exploration on MOX-Based Gas Sensors

by

Arianna Rossi

^1,*

,

Elena Spagnoli

¹,

Alan Visonà

¹,

Danial Ahmed

¹,

Marco Marzocchi

²,

Vincenzo Guidi

¹

and

Barbara Fabbri

^1,*

¹

Department of Physics and Earth Sciences, University of Ferrara, Via Saragat 1/C, 44122 Ferrara, Italy

²

Sacmi Imola S.C., Olfactory Systems, Via Selice Provinciale, 17/a, 40026 Imola, Italy

^*

Authors to whom correspondence should be addressed.

Chemosensors 2024, 12(6), 111; https://doi.org/10.3390/chemosensors12060111

Submission received: 10 May 2024 / Revised: 7 June 2024 / Accepted: 10 June 2024 / Published: 14 June 2024

(This article belongs to the Special Issue Gas Sensors and Electronic Noses for the Real Condition Sensing)

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Abstract

Noxious gases such as sulfur-containing compounds can inflict several different adverse effects on human health even when present at extremely low concentrations. The accurate detection of these gases at sub-parts per million levels is imperative, particularly in fields where maintaining optimal air quality is crucial. In this study, we harnessed the capabilities of nanostructured metal-oxide semiconducting materials to detect sulfur dioxide, since they have been extensively explored starting from the last decades for their effectiveness in monitoring toxic gases. We systematically characterized the sensing performance of seven chemoresistive devices. As a result, the SnO₂:Au sensor demonstrated to be the most promising candidate for sulfur dioxide detection, owing to its highly sensitivity (0.5–10 ppm), humidity-independent behavior (30 RH% onwards), and selectivity vs. different gases at an operating temperature of 400 °C. This comprehensive investigation facilitates a detailed performance comparison to other devices explored for the SO₂ sensing, supporting advancements in gas detection technology for enhanced workplace and environmental safety.

Keywords: chemoresistive gas sensors; sulfur dioxide; metal oxides; air pollution; agriculture; fossil fuels plants

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MDPI and ACS Style

Rossi, A.; Spagnoli, E.; Visonà, A.; Ahmed, D.; Marzocchi, M.; Guidi, V.; Fabbri, B. SO₂ Detection over a Wide Range of Concentrations: An Exploration on MOX-Based Gas Sensors. Chemosensors 2024, 12, 111. https://doi.org/10.3390/chemosensors12060111

AMA Style

Rossi A, Spagnoli E, Visonà A, Ahmed D, Marzocchi M, Guidi V, Fabbri B. SO₂ Detection over a Wide Range of Concentrations: An Exploration on MOX-Based Gas Sensors. Chemosensors. 2024; 12(6):111. https://doi.org/10.3390/chemosensors12060111

Chicago/Turabian Style

Rossi, Arianna, Elena Spagnoli, Alan Visonà, Danial Ahmed, Marco Marzocchi, Vincenzo Guidi, and Barbara Fabbri. 2024. "SO₂ Detection over a Wide Range of Concentrations: An Exploration on MOX-Based Gas Sensors" Chemosensors 12, no. 6: 111. https://doi.org/10.3390/chemosensors12060111

APA Style

Rossi, A., Spagnoli, E., Visonà, A., Ahmed, D., Marzocchi, M., Guidi, V., & Fabbri, B. (2024). SO₂ Detection over a Wide Range of Concentrations: An Exploration on MOX-Based Gas Sensors. Chemosensors, 12(6), 111. https://doi.org/10.3390/chemosensors12060111

Note that from the first issue of 2016, this journal uses article numbers instead of page numbers. See further details here.

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SO₂ Detection over a Wide Range of Concentrations: An Exploration on MOX-Based Gas Sensors

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